Description
Give a postfix expression, which has 4 operators, ‘+’ , ‘-’, '*' , '/',and positive integers. Print the result.
Notice: testcases don't include parentheses so just follow arithmetic rule.
And you don't need to consider divide 0 or some tricky rules : )
Input
The input contains exactly 1 sequences of postfix expression. It contains operators, ‘+’ ‘-’ '*' '/',and positive integers separated by a space.
The end of the input is 0.
The length of input sequence is smaller than or equal to 40
Output
The output is the result of the expression.
There is a newline symbol in the end